Manual Icom iPW1 (page 9 of 20) (English)

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■ Grounding

To prevent electrical shock, television interference

(TVI), broadcast interference (BCI) and other prob-

lems, ground the linear ampliﬁer through the GROUND

terminal on the rear panel.

For best results, connect a heavy gauge wire or strap

to a long earth-sunk copper rod. Make the distance be-

tween the GROUND terminal and ground as short as

possible.

R WARNING: NEVER connect the

GROUND terminal to a gas or electric pipe, since

the connection could cause an explosion or electric

shock.

■ Antenna

For radio communications, the antenna is of critical im-

portance, along with output power and sensitivity. Se-

lect antenna(s), such as a well-matched 50 Ω antenna

with more than 2 kW power rating, and feedline. 1.5:1

of Voltage Standing Wave Ratio (VSWR) is recom-

mended for a desired band. Of course, the transmis-

sion line should be a coaxial cable.

When using 1 antenna, use the [ANT1] connector.

CAUTION: Protect your linear ampliﬁer from light-

ning by using a lightning arrestor.

INSTALLATION AND CONNECTIONS

PL-259 CONNECTOR INSTALLATION

30 mm ≈

⁄8 in 10 mm ≈

⁄8 in 1–2 mm ≈

⁄16 in

q Slide the coupling ring down. Strip the cable jacket

and soft solder.

w Strip the cable as shown at left. Soft solder the

center conductor.

e Slide the connector body on and solder it.

r Screw the coupling ring onto the connector body.

Antenna SWR

Each antenna is tuned for a specified frequency

range and SWR may be increased out-of-range.

When the SWR is higher than approx. 2.0:1, the lin-

ear ampliﬁer’s power drops to protect the ﬁnal FET.

In this case, an antenna tuner is useful to match the

linear amplifier and antenna. Low SWR allows full

power for transmitting even when using the antenna

tuner. The IC-PW1 has an SWR meter to monitor the

antenna SWR continuously.

30 mm

10 mm (soft solder)

10 mm

1–2 mm

SolderSolder

Soft

solder

Coupling ring

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Icom iPW1 Manual

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